Added critical section on using local common platform packages instead of Gitea registry:
- .pnpmfile.cjs configuration for local package resolution
- .npmrc configuration (remove repo-level GITEA_NPM_TOKEN)
- Environment variables (BYTELYST_PACKAGE_SOURCE)
- Verification commands to confirm local resolution
- Benefits of local package resolution (faster dev, offline, no registry dependency)
- Updated Phase 1 roadmap to include local package setup
This ensures other products follow the same approach of using local common-plat packages by default instead of pulling from Gitea registry.